The definition of this report is not valid or supported by this version of Reporting Services. The report definition may have been created with a later version of Reporting Services, or contain content that is not well-formed or not valid based on Reporting Services schemas. Details: '.', hexadecimal value 0x00, is an invalid character. Line 4632, position 10.

SSRS Reports have a placeholder property HTML – Interpret HTML tags as styles. That property allows you to use HTML tags while displaying report.

We have to face the problem when we want to display SharePoint`s RichText field content is SSRS Report. RichText field may contain some characters that are stored different in SharePoint DB and cannot be interpreted by SSRS as HTML (eg. :, &, {, <, >, list elements, etc.)